Does it make a difference? obviously safety is one, but does the plastic have any issues? like harder to hold or something (since glass is more ridgid). Who uses glass and who uses plastic? Thanks.

We use to carry glass bottles, however we eventually switched to plastic because it is lighter and also safer. Glass bottles are heavy for some individuals to pour all day and also may be slippery when in contact with water. Plastic are cheaper and could withstand drops, however you may need to change it occasionally because the bottles do get pretty beat up after many uses.